. Characters of age, sex and sexual maturity in Canada geese. Canada goose; Birds. Fig. 4. — Dorsal view of lower i)ack and tail of a lesser Canada goose, Branta canudcnsin purvipes, shot at Perry Ri\cr, Northwest Territories, on July 3, 1949. The faded, pointed primaries of the immature plumage eontrast with the black, adult-type tail feathers. Fig. .3. — Primary feathers of an adult Canada goose, A, and an immature, B, in winter. Feather tips of the adult are rounded; those of the iuuiiature are pointed. tilt' migration period, tlic last half of April and the first half of .May. Most yearlin
. Characters of age, sex and sexual maturity in Canada geese. Canada goose; Birds. Fig. 4. — Dorsal view of lower i)ack and tail of a lesser Canada goose, Branta canudcnsin purvipes, shot at Perry Ri\cr, Northwest Territories, on July 3, 1949. The faded, pointed primaries of the immature plumage eontrast with the black, adult-type tail feathers. Fig. .3. — Primary feathers of an adult Canada goose, A, and an immature, B, in winter. Feather tips of the adult are rounded; those of the iuuiiature are pointed. tilt' migration period, tlic last half of April and the first half of .May. Most yearlings retained some im- mature type tail feathers until the onset of the moll. Tlie above findings apply partieiilarly to Branlu caiuulcnsis interior of the Missi,ssippi Flyway. That they do not apply equally well to all races of Canada geese heeame apparent in late Jannar\', 1962, when 100 individuals of the subspecies B. c. maxima, the giant Canada goose, were examined by the writer at their major wintering area, the city park of Rt)ehester, Minnesota, and the nearby surrounding eoiuitr\side. Plumage characters of the immature B. c. maxima at Rochester re\'ealed these geese to be in a much more advanced stage of development at a comparable date than the immatures of B. c. interior in southern llli I nois. The tail molt was especially well ad\'anced in \ the Minnesota birds; at least 5 of the 40 immatures I examined had a complete set of adult-type tail fcath-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hanson, Harold C. (Harold Carsten), 1917-. Urbana
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